We present the results of a photometric multisite campaign on the \(\delta\) Scuti Pre-Main-Sequence star IP Per. Nine telescopes have been involved in the observations, with a total of about 190 ...hours of observations over 38 nights. Present data confirms the multiperiodic nature of this star and leads to the identification of at least nine pulsational frequencies. Comparison with the predictions of linear non-adiabatic radial pulsation models allowed us to identify only five of the nine observed frequencies, and to constrain the position of IP Per in the HR diagram. The latter is in good agreement with the empirical determination of the stellar parameters obtained by Miroshnichenko et al. (2001). An initial interpretation of the observed frequencies using the Aarhus non-radial pulsation code suggests that three frequencies could be associated with non-radial (\(l\)=2) modes. Finally, we present new evolutionary and pulsation models at lower metallicity (Z=0.008) to take into account the possibility that IP Per is metal deficient, as indicated by Miroshnichenko et al. (2001).
Etudes de la biologie et de l'exploitation des petits pelagiques en Tunisie Gaamour, A; FAO, Mazara del Vallo (Italy). MedSudMed Project eng; Expert Consultation on Small Pelagic Fishes: Stock Identification and Oceanographic Processes Influencing their Abundance and Distribution eng 1-3 Oct 2003 Salammbo (Tunisia) ...
20/Dec
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The post-surgical malignant recurrences of bronchogenic cancer may be classified as local, regional, locoregional. The present series is based on 115 patients observed in 1982-1987. In all of them a ...tumour recurrence was clinically and/or radiologically suspected: the histological findings or the follow-up confirmed such a diagnosis in 52 cases. A correct radiological assessment is based on a full knowledge of three items: 1) early and late complications of the surgical intervention; 2) available diagnostic tools for a differential diagnosis between usual post-operatory sequelae and neoplastic recurrences. 3) pathologic history of the patient and his tumour.
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